The secret of success is focus of purpose.

I start where the last man left off.

Consider data without prejudice.

I am not overly impressed by the great names and reputations of those who might be trying to beat me to an invention. It's their 'ideas' that appeal to me. I am quite correctly described as 'more of a sponge than an inventor

X-rays ... I am afraid of them. I stopped experimenting with them two years ago, when I came near to losing my eyesight and Dally, my assistant practically lost the use of both of his arms.

Even though I am nearly deaf, I seem to be gifted with a kind of inner hearing which enables me to detect sounds and noises which the ordinary person does not hear.

Discontent is the first necessity of progress.